Synthesis and characterization of potassium 1,3-bis(N-methylpiperazino)propan-2-O-xanthate and the complexes of Co(II), Ni(II) and Cu(I) ions

Syntheses, Characterization, Thermal, and Antimicrobial Studies of Lanthanum(III) Tolyl/Benzyldithiocarbonates

Lanthanum(III) tris(O-tolyl/benzyldithiocarbonates), [La(ROCS₂)] (R = o-, m-, p-CH₃C₆H₄ and C₆H₅CH₂), were isolated as yellow solid by the reaction of LaCl₃·7H₂O with sodium salt of tolyl/benzyldithiocarbonates, ROCS₂Na (R = o-, m-, p-CH₃C₆H₄ and C₆H₅CH₂), in methanol under anhydrous conditions in 1 : 3 molar ratio. These complexes have formed adducts with nitrogen and phosphorus donor molecules by straightforward reaction of these complexes with donor ligands, which have the composition of the type [La(ROCS₂)₃·nL] (where n = 2, L = NC₅H₅ or P(C₆H₅)₃ and n = 1, L = N₂C₁₂H₈ or N₂C₁₀H₈). Elemental analyses, mass, IR, TGA, and heteronuclear NMR (¹H, ¹³C and ³¹P) spectroscopic studies indicated bidentate mode of bonding by dithiocarbonate ligands leading to hexacoordinated and octacoordinated geometry around the lanthanum atom. Antimicrobial (antifungal and antibacterial) activity of the free ligands and some of the complexes have also been investigated which exhibited significantly more activity for the complexes than the free ligands.